Latest / The Refrigeration Mentor Podcast / Episode 386. CO2 Piping

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Episode 386. CO2 Piping · The Refrigeration Mentor Podcast

• 0:00
  Speaker: What's up everyone? Troy Matthews from Refrigeration Mentor. Super pumped up. You're listening. Again, thank you for all the love, the feedback. I consistently see technicians growing who are listening to the podcast. And that, that's what we do this for. Had a conversation with a, a contractor today, and one of the things that he is saying is like the help with reducing callbacks, the confidence in technicians, helping the technicians solve harder problems and really reducing the cost to lead technicians and service managers.
• 0:03
  Start to spec it. I think it was 2006 maybe. That's when I started to see the spec and the new spec where we needed to start to purge. Did it always happen? I don't think so because it was, , it's that change. But then we got to a point where we were doing the purging and learning how to. Purge it properly, but what I didn't know is really how to properly braise properly the steps.
• 0:06
  I just talked. Like two manufacturers this week about this, and they said they've always done it off the bottom and never ran into an issue with coming off the bottom. Not to say that in certain applications you could run into issues. So now with, when we talk about a big industrial application, you have some time just one main liquid going out to that one or two coils, and that is it.
• 0:09
  'cause if you have like five, eight lines, that's gonna be different spacing than inch and five or two inch two, two and one eight lines. So you've got to understand how to do this properly. So. If you're doing larger lines and you're doing just say, suctions of like inch and three, inch and five, two, and one, two, and five, and they're all going on the same run, I would space them out on the engine three, the smaller one, the smallest one, and then with your, your saddles, you put the, the smaller liquid lines on the top as best as possible, and on top of the installations.
• 0:12
  It was the refrigeration technician getting the trades that really work around all the stuff, refrigeration in, in these stores, which was always cool. I hear it's not the same way anymore. There was a bit of loss that, but I remember my foreman man, he was. He was pretty much telling how help guide the, the foreman of the, the job on how to run all the trades.
• 0:15
  These are lower pressure systems. So you're using KA lot of K copper in there for the suction lines, the liquid lines. And as you get bigger in the copper, your pressure gets derated because now in the thinner of the walls, as it gets bigger, so now you're, when you have like a little, a little three eight pipe, you got really thick.
• 0:18
  So if your pressure relief is say 650 PSI, you gotta blank off the, the pressure relief. Just say this is off the flash tank and you're doing a low pressure CO2 system. You have to do a 10% above that. So you're doing like almost 800, 800 PSI pressure test, whatever, 10% above that. So now if you're doing all the stainless steel or high pressure piping, and just say your pressure relief is 120 bar or it's 740 PSI, whatever that, that high pressure's 10% above that.
• 0:21
  And , I am still learning. I, what I do is I'm investigating more and learning and seeing these different application, and I see them both running very, very well. I, I'd love to, if any of you run into issues where there are. Piping issues because of the way it is for an example, coming off the side or off the bottom for the liquid.
• 0:24
  And if you're a retailer out there or an end user out there, just remember, or a contract. Just remember doing it right, takes more time, takes more money, and ? And it just it can be a change, which a lot of people, a lot of people, it's tough to, tough to do, to be honest. Right? So, so if you have done a lot of.
• 0:27
  ? Just talking about the thickness and the size and industrial guys, definitely. And now they take that to the CO2 side, which is really cool to see where we don't see that as much in the commercial refrigeration. We're just using like armaflex most of the time. So now, now that there's a mix of commercial and industrial mixing together, I'm starting to see the best of both worlds.
• 0:30
  , Like the things that the talking. We'll do a quick recap, , proper hangar spacing, proper installation side, proper material. So the piping is is stainless steel K 65 XHPK copper. Proper support proper velocity, proper traps at the bottom and the top. Proper suction riser proper clamping, maybe not too many clamping.